Loop through all the rows of a GridView

One simple way to loop through all the rows in all the pages of a GridView is to access its DataSource. In this example, we will loop through the SQLDataSource to retrieve all the rows in a GridView and access its cell value. You can modify the logic depending on the type of controls you have added to the GridView

C#

protected void btnLoop_Click(object sender, EventArgs e)
{
    DataSourceSelectArguments dsaArgs = new DataSourceSelectArguments();
    DataView view = (DataView)SqlDataSource1.Select(dsaArgs);
    DataTable dt = view.ToTable();
    for (int i = 0; i < dt.Rows.Count; i++)
    {
        for (int j = 0; j < dt.Columns.Count; j++)
        {
            string s = dt.Rows[i][j].ToString();
        }
    }
}

VB.NET

Protected Sub btnLoop_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim dsaArgs As New DataSourceSelectArguments()
    Dim view As DataView = CType(SqlDataSource1.Select(dsaArgs), DataView)
    Dim dt As DataTable = view.ToTable()
    For i As Integer = 0 To dt.Rows.Count - 1
        For j As Integer = 0 To dt.Columns.Count - 1
            Dim s As String = dt.Rows(i)(j).ToString()
        Next j
    Next i
End Sub

Note: If you loop through the GridView instead of the DataSource, you will loop through the rows only for 'that current page'

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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

Follow him on twitter @suprotimagarwal